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Wenyou Yanga3b59b12015-11-02 10:57:09 +08001/*
2 * Copyright (C) 2015 Atmel Corporation
3 * Wenyou.Yang <wenyou.yang@atmel.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
Wenyou Yanga0d0d862016-08-10 10:51:05 +08009#include <clk.h>
10#include <dm.h>
Wenyou Yanga3b59b12015-11-02 10:57:09 +080011#include <malloc.h>
12#include <sdhci.h>
13#include <asm/arch/clk.h>
14
15#define ATMEL_SDHC_MIN_FREQ 400000
16
Wenyou Yanga0d0d862016-08-10 10:51:05 +080017#ifndef CONFIG_DM_MMC
Wenyou Yanga3b59b12015-11-02 10:57:09 +080018int atmel_sdhci_init(void *regbase, u32 id)
19{
20 struct sdhci_host *host;
21 u32 max_clk, min_clk = ATMEL_SDHC_MIN_FREQ;
22
23 host = (struct sdhci_host *)calloc(1, sizeof(struct sdhci_host));
24 if (!host) {
25 printf("%s: sdhci_host calloc failed\n", __func__);
26 return -ENOMEM;
27 }
28
29 host->name = "atmel_sdhci";
30 host->ioaddr = regbase;
31 host->quirks = 0;
Wenyou Yanga3b59b12015-11-02 10:57:09 +080032 max_clk = at91_get_periph_generated_clk(id);
33 if (!max_clk) {
34 printf("%s: Failed to get the proper clock\n", __func__);
35 free(host);
36 return -ENODEV;
37 }
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010038 host->max_clk = max_clk;
Wenyou Yanga3b59b12015-11-02 10:57:09 +080039
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010040 add_sdhci(host, 0, min_clk);
Wenyou Yanga3b59b12015-11-02 10:57:09 +080041
42 return 0;
43}
Wenyou Yanga0d0d862016-08-10 10:51:05 +080044
45#else
46
47DECLARE_GLOBAL_DATA_PTR;
48
49struct atmel_sdhci_plat {
50 struct mmc_config cfg;
51 struct mmc mmc;
52};
53
Wenyou Yanga0d0d862016-08-10 10:51:05 +080054static int atmel_sdhci_probe(struct udevice *dev)
55{
56 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
57 struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
58 struct sdhci_host *host = dev_get_priv(dev);
59 u32 max_clk;
60 u32 caps, caps_1;
61 u32 clk_base, clk_mul;
62 ulong gck_rate;
63 struct clk clk;
64 int ret;
65
Wenyou Yang339cb072016-09-27 11:00:34 +080066 ret = clk_get_by_index(dev, 0, &clk);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080067 if (ret)
68 return ret;
69
70 ret = clk_enable(&clk);
71 if (ret)
72 return ret;
73
74 host->name = dev->name;
75 host->ioaddr = (void *)dev_get_addr(dev);
76
77 host->quirks = 0;
Simon Glasse160f7d2017-01-17 16:52:55 -070078 host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
Wenyou Yanga0d0d862016-08-10 10:51:05 +080079 "bus-width", 4);
80
81 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
82 clk_base = (caps & SDHCI_CLOCK_V3_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
83 caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
84 clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >> SDHCI_CLOCK_MUL_SHIFT;
85 gck_rate = clk_base * 1000000 * (clk_mul + 1);
86
Wenyou Yang339cb072016-09-27 11:00:34 +080087 ret = clk_get_by_index(dev, 1, &clk);
Wenyou Yanga0d0d862016-08-10 10:51:05 +080088 if (ret)
89 return ret;
90
91 ret = clk_set_rate(&clk, gck_rate);
92 if (ret)
93 return ret;
94
95 max_clk = clk_get_rate(&clk);
96 if (!max_clk)
97 return -EINVAL;
98
Stefan Herbrechtsmeier6d0e34b2017-01-17 15:58:48 +010099 host->max_clk = max_clk;
100
101 ret = sdhci_setup_cfg(&plat->cfg, host, 0, ATMEL_SDHC_MIN_FREQ);
Wenyou Yanga0d0d862016-08-10 10:51:05 +0800102 if (ret)
103 return ret;
104
105 host->mmc = &plat->mmc;
106 host->mmc->dev = dev;
107 host->mmc->priv = host;
108 upriv->mmc = host->mmc;
109
110 clk_free(&clk);
111
112 return sdhci_probe(dev);
113}
114
115static int atmel_sdhci_bind(struct udevice *dev)
116{
117 struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
Wenyou Yanga0d0d862016-08-10 10:51:05 +0800118
Masahiro Yamada24f5aec2016-09-06 22:17:32 +0900119 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
Wenyou Yanga0d0d862016-08-10 10:51:05 +0800120}
121
122static const struct udevice_id atmel_sdhci_ids[] = {
123 { .compatible = "atmel,sama5d2-sdhci" },
124 { }
125};
126
127U_BOOT_DRIVER(atmel_sdhci_drv) = {
128 .name = "atmel_sdhci",
129 .id = UCLASS_MMC,
130 .of_match = atmel_sdhci_ids,
131 .ops = &sdhci_ops,
132 .bind = atmel_sdhci_bind,
133 .probe = atmel_sdhci_probe,
134 .priv_auto_alloc_size = sizeof(struct sdhci_host),
135 .platdata_auto_alloc_size = sizeof(struct atmel_sdhci_plat),
136};
137#endif